HEMA, the material of the previous generation of contact lenses, has low oxygen permeability. Wearing it for a long time can cause or accompany significant corneal swelling, corneal dehydration (dry eye), superior corneal epithelial arcuate lesion (SEAL), corneal edema, visual impairment, decreased nerve ending sensation, limbal vascular proliferation, decreased corneal epithelial and endothelial function, etc.

The appearance of silicon contact lenses has greatly improved the oxygen permeability of lenses, but the surface wettability of silicon products is low and the compatibility with eyes is poor. As a result, the first and second generation silicone hydrogel contact lenses exhibit less desirable characteristics, such as increased lipid and protein deposition, adhesion of the lens to the surface of the eyeball, and general irritation to the lens wearer.

The third generation silicone hydrogel contact lens material of pharnorcia overcomes the disadvantages of the first generation and the second generation silicone hydrogel. Achieve that revolutionary function of the third generation of silicone hydrogel contact lenses. The pharnorcia breaks the international monopoly, and the latest silicone hydrogel contact lens material promotes the eye-loving revolution.

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